Neutral Sterols of Cephalic Glands of Stingless Bees and Their Correlation with Sterols from Pollen

Table 2

Relative percentages (Mean ± standard deviation) of sterols in pollen and glands of Melipona  scutellaris newly emerged workers (New), nurse bees (Nur), and foragers (For).  N = 10 (glands) and N = 2 (pollen samples, 1 g per sample).

	Hypopharyngeal				Mandibular			Labial
	Pollen	New	Nur	For	New	Nur	For	New	Nur	For
Cholesterol	0.33 ± 0.35	11.20 ± 1.9	2.31 ± 0.8	—	19.96 ± 28.5	21.45 ± 24.0	28.43 ± 11.0	20.79 ± 13.8	14.30 ± 7.5	28.10 ± 36.5
Campesterol	10.97 ± 1.58	5.06 ± 2.1	52.32 ± 31.9	52.71 ± 25.5	16.39 ± 6.7	29.19 ± 11.6	26.88 ± 11.8	31.52 ± 33.9	—	9.64 ± 8.1
Stigmasterol	1.42 ± 1.54	—	—	—	—	—	—	—	—	5.50 ± 8.42
Sitosterol	53.08 ± 19.2	71.27 ± 5.6	34.61 ± 21.8	37.22 ± 37.1	48.18 ± 16.1	34.68 ± 16.9	34.65 ± 28.7	25.90 ± 15.7	58.93 ± 19.7	43.91 ± 28.9
Isofucosterol	27.37 ± 9.9	12.47 ± 2.7	10.76 ± 4.8	10.07 ± 13.4	15.47 ± 3.5	14.69 ± 6.4	10.04 ± 10.1	21.79 ± 24.4	26.77 ± 9.1	12.85 ± 7.2
Lanosterol	6.85 ± 5.9	—	—	—	—	—	—	—	—	—